<template>
	<view class="">
		<view class="search-box">
		  <uni-search-bar @input="input" :radius="100" cancelButton="none"></uni-search-bar>
		</view>
		
		<!-- 搜索建议列表 -->
		<view class="sugg-list" v-if="searchResults.length !== 0">
		  <view class="sugg-item" v-for="(item, i) in searchResults" :key="i" @click="gotoDetail(item)">
		    <view class="goods-name">{{item.goods_name}}</view>
		    <uni-icons type="arrowright" size="16"></uni-icons>
		  </view>
		</view>
		
		<!-- 搜索历史 -->
		<view class="history-box" v-else>
		  <!-- 标题区域 -->
		  <view class="history-title">
		    <text>搜索历史</text>
		    <uni-icons type="trash" size="17" @click="clean"></uni-icons>
		  </view>
		  <!-- 列表区域 -->
		  <view class="history-list">
		    <uni-tag :text="item" v-for="(item, i) in historyList" :key="i" @click="gotoGoodsList(item)"></uni-tag>
		  </view>
		</view>
	</view>
</template>

<script >
	export default {
		data() {
			return{
				// 用户输入的关键词
				kw: '',
				// 防抖
				timer: null,
				// 搜索的结果列表
				searchResults: [],
				// 搜索历史的数组
				historyList: []
			}
		},
		onLoad() {
		  this.historyList = JSON.parse(uni.getStorageSync('kw') || '[]')
		},
		methods: {
			// input用户输入事件，e拿到用户输入的内容
			input(e) {
				// if(e.value === '') return
				clearTimeout(this.timer)
				// 防抖，500毫米内只执行一次
				this.timer = setTimeout(() => {
					this.kw =  e
					this.getSearchList()
					console.log(e);
				},500)
				
			},
			async getSearchList() {
			  // 判断搜索关键词是否为空
			  if (this.kw.length === 0) {
			    this.searchResults = []
			    return
			  }
			
			  const { data: res } = await uni.$http.get('/api/public/v1/goods/qsearch', { query: this.kw })
			  if (res.meta.status !== 200) return uni.$showMsg()
			  this.searchResults = res.message
			
			  this.saveSearchHistory()
			},
			// 对搜索历史进行存储
			saveSearchHistory() {
			  // this.historyList.push(this.kw)
			
			//   const set = new Set(this.historyList)
			//   set.delete(this.kw)
			//   set.add(this.kw)
			
			//   this.historyList = Array.from(set)
			  
			  this.historyList = [...new Set([this.kw,...this.historyList])].splice(0,10)
			
			  // 对搜索历史数据，进行持久化的存储
			  uni.setStorageSync('kw', JSON.stringify(this.historyList))
			},
			gotoDetail(item) {
			  uni.navigateTo({
			    url: '/subpkg/goods_detail/goods_detail?goods_id=' + item.goods_id
			  })
			},
			// 清空搜索记录
			clean() {
			  this.historyList = []
			  uni.setStorageSync('kw', '[]')
			},
			// 点击搜索历史关键词跳转商品列表页
			gotoGoodsList(kw) {
			  uni.navigateTo({
			    url: '/subpkg/goods_list/goods_list?query=' + kw
			  })
			}
			
		}
	}
</script>

<style lang="scss" scoped>
.search-box {
	position: sticky;
	top: 0;
	z-index: 999;
}
 .sugg-list {
    padding: 0 5px;

    .sugg-item {
      display: flex;
      align-items: center;
      justify-content: space-between;
      font-size: 12px;
      padding: 13px 0;
      border-bottom: 1px solid #efefef;

      .goods-name {
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
        margin-right: 3px;
      }
    }
  }

  .history-box {
    padding: 0 5px;

    .history-title {
      display: flex;
      justify-content: space-between;
      height: 40px;
      align-items: center;
      font-size: 13px;
      border-bottom: 1px solid #efefef;
    }

    .history-list {
      display: flex;
      flex-wrap: wrap;

      .uni-tag {
        margin-top: 5px;
        margin-right: 5px;
      }
    }
  }
</style>
